Now, I have some problems with my models that I uploaded before (and upload now):
I can not view it in 3d. I have square image with "this model is no longer publicly available" and
error's description - "Class not found: undesign.UDesignApplet"

On my another pc my 3d models view with some problems... It seems like my model has a lot of spots on the surface.

Also have a problem with your download feature. I can not open downloaded original file of the model -
it says "The archive is unknown format or damaged".